docs: def remove_too_short(utterances: List[Utterance],
                       _winlen=25, winstep=10) -> List[Utterance]:
      """ Removes utterances that will probably have issues with CTC because of
      the number of frames being less than the number of tokens in the
      transcription. Assuming char tokenization to minimize false negatives.
      """
      def is_too_short(utterance: Utterance) -> bool:
          charlen = len(utterance.text)
          if (duration(utterance) / winstep) < charlen:
              return True
          else:
              return False
  
      return [utter for utter in utterances if not is_too_short(utter)]